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package com.oracle.truffle.api.debug.test;

import java.util.Timer;
import java.util.TimerTask;

import org.junit.Assert;
import org.junit.Test;

import com.oracle.truffle.api.debug.Debugger;
import com.oracle.truffle.api.debug.SuspendedCallback;
import com.oracle.truffle.api.debug.SuspendedEvent;
import com.oracle.truffle.api.instrumentation.test.InstrumentationTestLanguage;
import org.graalvm.polyglot.Context;
import org.graalvm.polyglot.PolyglotException;
import org.graalvm.polyglot.Source;

public class TimeBoxingTest {

    @Test
    public void testTimeBoxing() throws Exception {
        final Context context = Context.create();
        Source source = Source.newBuilder(InstrumentationTestLanguage.ID, "ROOT(LOOP(infinity,STATEMENT))", "NotEnoughTime").buildLiteral();
        Debugger debugger = context.getEngine().getInstruments().get("debugger").lookup(Debugger.class);

        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                debugger.startSession(new SuspendedCallback() {
                    public void onSuspend(SuspendedEvent event) {
                        event.prepareKill();
                    }
                }).suspendNextExecution();
            }
        }, 0, 10);

        try {
            context.eval(source); // throws KillException, wrapped by PolyglotException
            Assert.fail();
        } catch (PolyglotException error) {
            Assert.assertTrue(error.isCancelled());
            Assert.assertTrue(error.getMessage(), error.getMessage().contains("Execution cancelled by a debugging session."));
        }
        timer.cancel();
    }

}
